Make "mappings" as a first class property to obographs?

[matentzn]

Like this?

{
    "id": "http://purl.obolibrary.org/obo/MONDO_0014957",
    "meta": {
        "mappings": [
            {
                "pred": "exact",
                "val": "UMLS:C4310678",
                "xrefs": [
                    "Orphanet:123"
                ],
                "meta": {
                    "basicPropertyValues": [
                        {
                            "pred": "sssom:mapping_justification",
                            "val": "semapv:ManualMappingCuration"
                        },
                        {
                            "pred": "sssom:confidence",
                            "val": 0.9
                        }
                    ]
                }
            },
            {
                "pred": "related",
                "val": "OMIM:617182",
                "meta": {
                    "basicPropertyValues": [
                        {
                            "pred": "sssom:mapping_justification",
                            "val": "semapv:ManualMappingCuration"
                        },
                        {
                            "pred": "sssom:confidence",
                            "val": 0.9
                        }
                    ]
                }
            }
        ],
        "basicPropertyValues": [
            {
                "pred": "http://www.w3.org/2004/02/skos/core#exactMatch",
                "val": "http://linkedlifedata.com/resource/umls/id/C4310678"
            },
            {
                "pred": "http://www.w3.org/2004/02/skos/core#relatedMatch",
                "val": "https://omim.org/entry/617182"
            }
        ]
    },
    "type": "CLASS",
    "lbl": "language delay and attention deficit-hyperactivity disorder/cognitive impairment with or without cardiac arrhythmia"
}